president obama speaking at the white house last night. >> tonight our thoughts and prayers are with the mandela family in south africa. they're grieving the loss of a man, a moral giant who embodied the dignity and courage and hope and sought to bring about justice not only in south africa but i think to inspire millions around the world and he did that. the idea that every single human being ought to be free and that oppression can end and justice can prevail. >> yes. >> that's what -- that was a supreme court justice who said yes. >> the president is expected to travel to south africa for one of the memorials or the funerals. we are not sure which but the president has, indeed, ordered flags to be lowered to half staff through monday. >> the former presidents are weighing in as well. george w. bush welcoming mandela to the white house after his release from prison says nelson mandela had the remarkable capacity to forgive his jailers following 26 years of wrongful imprisonment and setting a powerful example of redemption and grace for us all. >> george w. bush sending condolences